Boring-machine.



L. W. JONES. BORING MACHINE.

APPLIOATIOH FILED JAN. 26, 1909.

959 632 Patented Sept. 6, 1910.

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FIE'E :1 35 mm d T 16 Z l 10 V 1 g I 12 17 r Z i 15 a L 1 I II II II II I! II II II I] [I H i 1 Q I m 26 awe/whom LOUIS W. JONES, OF LOUISVILLE, KENTUCKY.

edema-MACHINE.

Specification of Letters Patent. Pa tented Sept, 6, 1910,

Application filed January 26, 1909. Serial No. 474,339.

To all whom it may concern:

Be itknown that I. LOUIS W. Jones, a citizen of the United States, residing at Louisvi le. in the county of Jefferson and State 0; Kentucky. have invented new and us fill I nprovements in Boringhilachines,

of which the following is a specification.

This invention relates to a machine for boringholes in joists of buildings, particularly holes to receive electric wiring and has tor its object to produce a portable hand machine that is adjustable in such manner that the person operating it while standing upon'the floor oi the apartment. can bore holes in the joists above Whatever the height of the. latter above the floor: and has for a further object to produce a handboring machine which is adapted to operate upon floor joists.

I have in the accompanying drawings illustrated the preferred form of my invention. therein representing a machine thatis adapted when set in one position to bore in the joists above and when inverted, and properly adjusted, to bore the floor joists below. i

- In the accompanying drawings, Figure 1 is a front elevation of the machine set up in the position occupied when boring holes in overhead joists, parts being broken away and in section to illustrate details of construction. Fig. 2 is a side elevation 01 the machine when inverted and the parts adjusted tot-boring floor joists below. Fig. 3 35, is aview of the lower part of the machine when adjusted as shown in Fig. 2, the parts however, being in different positions from those represented in said view. Fig. 4 is a horizontal sectional view taken on the line IVIV of Fig. 3.

The frame of the machine is an extensible column which is preferably formed of a plurality of telescoping tubular sections. For most purposes ,three sections are preferred and the column of the machine shown in the-drawings is represented as being formed of that number of parts, although for some of the purposes of the invention a machine with a column formed of two telcscopic parts would be practical. The upper section oftheeolumn, 2, is provided atits outer end with a head 23in which is suitably mounted a rotatable spindle 4 adapted to carry a boring tool (3. To the spindle '4 is secured a sprocket wheel 5 with which engages a drive chain 15.

7 represents the lower section of the column. It is provided atits outer end with a foot tion 12.

For most purposes it is desirable to form the column of three parts or sections, an in termediate section 12 being interposed between the upper and lower ones, as indicated in the drawings, clamps 11 and 13, be-

ing used, the former at the lower end of the intermediate section 12 for clamping together it. and the lower section, and the lat ter, 13, at the lower end of the section 2- for uniting it and the intermediate section.

A column constructed as described of telescopic sections and holding clamps is-susceptilole of a wide range of adjustments so that the boring tool can be made to accurately engage with and easily bore int-o the joists of a roonrwith a. fourteen foot or even higher ceiling. It is customary to operate the machine by pulling upon the chain 15 piece 8 and telescopes into the secso as to rotate the bit or boring tool, and for 7 effective operation the operator should-, be able to give a full sweep of the arm as he grasps the chain and draws it downtoward the lower wheel 9.

In all boring machines of the general type to which mine belongs employing hand chains for rotating the toolspindle of which I have knowledge, it has been the custom to mount the lower wheel with which the sprocket chain engages upon the same section of the adjustable column as that which carries the head in which the boring tool is mounted, with the result that when the column is extended to carry the bit upward the lower sprocket wheel is correspondingly raised, so that the operator often finds it impossible to reach the chain sufficiently far above the wheel to allow him to give a desirably long pull upon the chain without himself having to stand upon some supportabove the tloor level, which is often incon veuient. To remedy this objection, I mount the lower wheel 9, which is 'n'eferably a llanged'wheel, to retain t-l1e chain in place, in a bearing 25 carried by a clamp ring 10 mounted upon the lower section -7 of the column. .The chain is preferably formed of easily separable links, so that whenever the length of the column is to be changed the chain is separated and the necessary number of links either added or removedthe position This arrangement leaves the lower sprocket wheel at the same distance above the foot piece8 whatever be the length to which the column is adjusted, so that the operator can manipulate the chain to the best advantage. By adjustably mounting the lower wheel as described it can beset in such position upon the lower section? as best suits the particular machine to which it is applied, or the convenience of the person operating the machine.

When it is desired to employ the machine for boring in the joists below thelioor level, it is inverted from the position indicated in Fig. 1 and an attachment is brought into use which I will now proceed to describe. This attachment is not usually required when boring in the ceiling joists and when the machine isused for that purpose-it may be entirely removed troml the machine, or the parts may be adjusted into the positions indicated in Fig. l where they are out of the 8, 18. indicate a pair of rods adapted to rest upon the upper-edge of the tloor sills and formasupport for the machine when inverted as shown in Figs. 2 and 3. These rods are mounted in bearings 17 carried by an adjustable clamp 16 mounted upon the upper section 2 of the column near the spindle head. The bearings 17 are loose upon the rods 18 and are free to move along the latter, which in use constitute a track ior the machine as well as a support there- It will be'understood that by properly adjusting the clamp 16 the boring tool may beset so as to bore any desired distance below the edges of the joists upon which the'supporting rods 18 may rest. The rods 18 a re united at their ends by cross bars lt), these parts 18 and it) thus constituting a rigid i frame. I

20 represents a, slide encircling the column and freely movable along the same.

21 indicates a rigid push bar pivotally connected at one end to the slide 20 and at its opposite end journalcd upon one of the cross bars 19. Upon this push bar is prct' erably mounted a foot rest 24; which may be rovided Witha toe clip 26.

The parts being in the positions indicated in Fig. 2 the operator places his foot upon the piece 24 and resses thereon. This operates to force the point of the bit against the wood and causes the frame of the machine to follow the tool as it enters the joist. At the same time he grasps operates the hit in the well-known manner. Upon the hole being bored the Frame is slid back upon the rods 18. as the tool is rotated in a reverse direction, ing the operator in restoring the parts from indicated in Fig. 3 to the position represented in Fig. 2.

the chain and 1 the toe clip 2t) assistsv ing the column from its vertical position." This is due to connecting the push bar with the column by a sliding collar and a pivot joint. By arranging the fiXt-id bearing for the outer end of thepush bar upon the frame which supports the machine, such- -frame can be made to serve as a guide for directing the longitudinal movement of the tool, since whatever force may be applied to l so i l the bar tending to advance the column and l tool is also applied, but in an opposite direction, to the supporting frame, and hence there is not the same tendency to shift the support as there would he were the fixed bearing or'abutmeut for the bar provided by some object other than the said support.

Itwill be understood that when the machine is inverted aml operating upon floor joists that the sections of the column 'will be telescoped together, reducing the length of the column as much as possible. 1 am thus enabled to bring its length down to between five and six feet.

The rods 18 which serve to support the 100 machine when working on floor joists also operate as gages to determine the distance 1 from the edgeot' the joists at which the tool l will bore; it man under some circumstances he found desirable to use this gage in bor- 1.05 ing ceiling joist In that event the machine 1 could he held up by hand with the gage 5 bars 18 resting against the under edges of i the joists. When the machine is arranged as shown in Fig. 1, not requiring the use of the support, the bars 18 thereof are turned substantially parallel with the column as represented in said ligure, and the encircling band 20 is slid. along the column until the push bar lies close to the latter, thus bringing these parts close to and approximately parallel with the column.

What I claim is 1. A boring machine comprising a column t carrying near one end a boring tool, a drive j mechanism for rotating the tool supported K by the column. a support for the column l when arranged with the tool-carrying end j downward consisting of a pair .o'tbars adapted to rest upon the edges of a pair o'f adjacent joists, the said bars constituting I guiding tracks between which the column is situated and along which it is movable connections lwtwccn the column and thebars l3 secured fast to the former and adapted to slide lengthwise upon the latter, and a rigid push bar for moving the column and the parts carried thereby along the said tracks having a fixed bearing at its outer end and a sliding connection with the column.

2. Aboring machine comprising a column carrying near one end a boring tool, means supported by the column for rotating the tool, a support for the column and tool when adjusted with the tool-carrying end downward consisting of transversely arranged bars adapted to rest upon the edges of adjacent joists and between which the column extends, and connections between the column and said bars, said connections being adjustable lengthwise of the column and free to slide upon the bars, substantially as and for the purposes set forth.

3. A boring machine ctnnprising a column carrying a boring tool, means for rotating the tool, a support for the column adapted to rest; upon the edges of adjacent joists, connections between the column and the support tree to slide lengthwise upon the. latter, and rigid means having bearing upon the said support and movable on said column for moving the column-relative to the support whereby the tool may be forcibly applied to the work upon which it operates.

4. A boring machine comprising a column ca wing a boring tool, means for rotating th tool, a support for the column adapted to rest upon the edges of adjacent joists, connections between the column and the supportfree to slide lengthwise upon the latter and to be guided thereby, and a push bar having a fixed support atits outer end and a sliding and pivotal connection with the column at the inner end, substantially as set forth.

5. A boring machine comprising a column carrying near one end a boring tool and a support for the column arranged to serve as a track along which the column, with the boring tool, is movable, the said support being arranged to be folded parallel with the column when not in use.

(5. A boring machine comprising a column carrying near one end a boring tool, means for operating the tool, a support for the column comprising a pair of bars between which the column is situated, a connection between the column and the said bars movable lengthwise of the latter which serve as a track for the column, the support being free to be turned substantially parallel with the column when not in use, a slide encircling the column and freely movable upon the same, and a push bar pivotally connecting the said slide and the support, substanially as described.

LOUIS \V. JONES.

\Vitnesses:

J. S. BARKER, Gno. B. Prrrs. 

